Bus Error Disk Failure
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challenged and removed. (July 2015) (Learn how and when to remove this template message) In computing, a bus error is a fault raised by hardware, notifying an bus error 10 c++ operating system (OS) that a process is trying to access memory that
Bus Error Linux
the CPU cannot physically address: an invalid address for the address bus, hence the name. In modern use
How To Solve Bus Error In Linux
on most architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in the logical address or permissions. On POSIX-compliant platforms, bus
Linux Bus Error Core Dumped
errors usually result in the SIGBUS signal being sent to the process that caused the error. SIGBUS can also be caused by any general device fault that the computer detects, though a bus error rarely means that the computer hardware is physically broken—it is normally caused by a bug in a program's source code.[citation needed] Bus errors may also sigbus error linux be raised for certain other paging errors; see below. Contents 1 Causes 1.1 Non-existent address 1.2 Unaligned access 1.3 Paging errors 2 Example 3 References Causes[edit] There are at least three main causes of bus errors: Non-existent address[edit] Software instructs the CPU to read or write a specific physical memory address. Accordingly, the CPU sets this physical address on its address bus and requests all other hardware connected to the CPU to respond with the results, if they answer for this specific address. If no other hardware responds, the CPU raises an exception, stating that the requested physical address is unrecognized by the whole computer system. Note that this only covers physical memory addresses. Trying to access an undefined virtual memory address is generally considered to be a segmentation fault rather than a bus error, though if the MMU is separate, the processor can't tell the difference. Unaligned access[edit] Most CPUs are byte-addressable, where each unique memory address refers to an 8-bit byte. Most CPUs can access individual bytes from each memory address, but they gene
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring bus error ubuntu developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ how to debug bus error Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it bus error vs segmentation fault works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top “bus error” when trying to reboot Linux up vote 5 down vote favorite 6 When trying to reboot a Linux https://en.wikipedia.org/wiki/Bus_error server I got the typical 'System going down for reboot now', but the server has not rebooted. I have tried: reboot shutdown -r now The runlevel command returns 5. Any other options for getting this server to reboot? This is a remote machine, so I don't want to just shut it down if I can avoid that. I am trying to reboot because of a journal abort on /, so / is read-only. Most commands now return 'bus error' linux http://serverfault.com/questions/57920/bus-error-when-trying-to-reboot-linux/57928 share|improve this question asked Aug 24 '09 at 13:06 Kyle Brandt♦ 57.4k41217384 A bus error is typically a result of a corrupted binary. One place I worked people would complain that the system was broken because their long running simulation would crash with a bus error whenever they compiled another simulation. "What did you call the simulation?" "huh" "okay -- what do you type to run the simulation?" "a.out" "okay, maybe you should rename your programs before you run them..." sigh. –chris Aug 24 '09 at 13:29 Oh -- except for netscape. For that, bus error was one of two common ways it exited. It was about 2/1 segfault vs bus error, but they changed it up to keep the internet fun... –chris Aug 24 '09 at 13:30 add a comment| 6 Answers 6 active oldest votes up vote 11 down vote accepted Kyle, I'm not quite sure if this is what you're looking for (since it's like pressing the reset button), but this has helped me in situations where a server refused to reboot: echo 1 > /proc/sys/kernel/sysrq echo b > /proc/sysrq-trigger The first line is for enabling SysRq, and the second one is for rebooting. See emergency reboot or shutdown with magic commands for more details. share|improve this answer answered Aug 24 '09 at 13:21 mfriedman 1,4591914 Nice to know! Thanks! –Bart Silverstrim Aug 24 '09 at 13:42 This se
Registered: 2012-09-20 Posts: 168 [SOLVED] Is this hard drive failing? I noticed this in my errors.log this morning. Is my SSD on it's way out.Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948843] ata1.00: failed command: https://bbs.archlinux.org/viewtopic.php?id=168331 WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948845] ata1.00: cmd 61/00:e0:00:08:5f/04:00:14:01:00/40 http://superuser.com/questions/927250/ssd-smart-errors-and-strange-dmesg-errors-is-this-a-dying-disk tag 28 ncq 524288 out Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948845] res 40/00:00:00:24:5f/00:00:14:01:00/40 Emask 0x10 (ATA bus error) Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948846] ata1.00: status: { DRDY } Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948847] ata1.00: failed command: WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948849] ata1.00: cmd bus error 61/00:e8:00:04:5f/04:00:14:01:00/40 tag 29 ncq 524288 out Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948849] res 40/00:00:00:24:5f/00:00:14:01:00/40 Emask 0x10 (ATA bus error) Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948851] ata1.00: status: { DRDY } Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948852] ata1.00: failed command: WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948854] ata1.00: cmd 61/00:f0:00:00:5f/04:00:14:01:00/40 tag 30 ncq 524288 out Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948854] bus error linux res 40/00:00:00:24:5f/00:00:14:01:00/40 Emask 0x10 (ATA bus error) Aug 15 21:17:25 ziltoid-pc kernel: [ 398.948855] ata1.00: status: { DRDY } Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486071] ata1.00: exception Emask 0x10 SAct 0x7fffffff SErr 0x400000 action 0x6 frozen Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486075] ata1.00: irq_stat 0x08000000, interface fatal error Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486077] ata1: SError: { Handshk } Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486080] ata1.00: failed command: WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486085] ata1.00: cmd 61/00:00:00:a4:5f/04:00:14:01:00/40 tag 0 ncq 524288 out Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486085] res 40/00:60:00:d4:5f/00:00:14:01:00/40 Emask 0x10 (ATA bus error) Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486087] ata1.00: status: { DRDY } Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486089] ata1.00: failed command: WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486092] ata1.00: cmd 61/00:08:00:a8:5f/04:00:14:01:00/40 tag 1 ncq 524288 out Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486092] res 40/00:60:00:d4:5f/00:00:14:01:00/40 Emask 0x10 (ATA bus error) Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486094] ata1.00: status: { DRDY } Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486095] ata1.00: failed command: WRITE FPDMA QUEUED Aug 15 21:17:25 ziltoid-pc kernel: [ 399.486098] ata1.00: cmd 61/00:10:00:ac:5f/04:00:14:01:00/40 tag 2 ncq 5
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top SSD SMART errors and strange dmesg errors, is this a dying disk? up vote 3 down vote favorite I've started noticing weird things in my dmesg log, and my 4 months old SSD. For example: [ 9.647535] ata7.00: exception Emask 0x10 SAct 0x7ffffbff SErr 0x300000 action 0x6 frozen [ 9.647542] ata7.00: irq_stat 0x08000000, interface fatal error [ 9.647546] ata7: SError: { Dispar BadCRC } [ 9.647551] ata7.00: failed command: READ FPDMA QUEUED [ 9.647558] ata7.00: cmd 60/b0:00:18:51:0f/03:00:07:00:00/40 tag 0 ncq 483328 in [ 9.647558] res 40/00:18:c8:5c:0f/00:00:07:00:00/40 Emask 0x10 (ATA bus error) [ 9.647561] ata7.00: status: { DRDY } [ 9.647564] ata7.00: failed command: READ FPDMA QUEUED [ 9.647570] ata7.00: cmd 60/00:08:c8:54:0f/04:00:07:00:00/40 tag 1 ncq 524288 in [ 9.647570] res 40/00:18:c8:5c:0f/00:00:07:00:00/40 Emask 0x10 (ATA bus error) [ 9.647573] ata7.00: status: { DRDY } I've also noticed that my SMART values are weird: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always - 16 199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 23 Runtime bad block seems to be steady, but it appears that UDMA CRC error is increasing after each reboot (probably due to Dispar BadCRC above), which is not nice.. After research online, I've tried replacing the SATA cable, but it doesn't look like it helped. Once the system is up, I can't really notice anything different, everything appears to be working, but I can't be sure since it's the system disk and isn't being written to as much.. I've seen this tip about disabling NCQ, but I have two other disks in there which benefit from NCQ, and there is no tip on how to disable it for